- CEO
- John A. Roush
- Sector
- Financial Services
- Industry
- Shell Companies
- Address
- 1133 Connecticut Avenue NW Washington DC United States of America 20036
- IPO Date
- Sep 17, 2020
- Business
- ACON S2 Acquisition Corp. is a publicly traded special purpose acquisition company (SPAC) primarily focused on effecting mergers, capital stock exchanges, asset acquisitions, stock purchases, reorganizations, or similar business combinations with companies that emphasize sustainability in their operations. Established as a blank check company, ACON S2 targets businesses that employ strategic approaches to environmental, social, and economic sustainability to drive performance and success. The company was founded with sponsorship from an affiliate of ACON Investments, L.L.C., an international private equity firm with operations spanning North America, Latin America, and Europe, and is headquartered in Washington, D.C.
The company completed an initial public offering (IPO) that raised $250 million, issuing 25 million units priced at $10 each, with units comprising one share of Class A common stock and redeemable warrants. Its shares trade on the Nasdaq Capital Market under the ticker symbol STWOU. A major recent corporate event for ACON S2 Acquisition Corp. was its October 2021 business combination with ESS Inc., a U.S.-based manufacturer of long-duration iron flow batteries for commercial and utility-scale energy storage applications. This transaction resulted in ESS becoming a publicly listed company on the New York Stock Exchange under the ticker GWH.
ESS Inc. designs, manufactures, and deploys environmentally sustainable, low-cost iron flow battery systems for energy storage applications requiring 4 to 12 hours of flexible capacity. Its core product offerings include the Energy Warehouse™ and Energy Center™, which use earth-abundant iron, salt, and water as electrolyte components, delivering a long-life, environmentally benign solution for grid-scale renewable energy storage. The transaction with ESS incorporated approximately $308 million of pro forma net cash, including private investments in public equity from institutional investors such as Fidelity Management & Research, Koch Industries, SoftBank Group affiliates, and others, positioning the combined entity for scaling operations in the expanding clean energy market.
Overall, ACON S2 Acquisition Corp. operates within the financial and technology sectors as a SPAC with a sustainability investment mandate, seeking mergers with companies that contribute to renewable energy and environmentally focused innovation across North America and beyond. The merger with ESS marks a strategic shift from a blank check SPAC to becoming the vehicle through which a leading energy storage technology firm went public, aligning with global trends toward clean energy and sustainability-focused business models.